Apparatus and method related to radio access network

Abstract

To enable a prompt increase in throughput of a terminal apparatus immediately after handover. An apparatus of the present invention includes: an acquisition unit 145 configured to acquire a response message for a handover message from a source base station (base station 200 ) of handover of a terminal apparatus 300, the response message including information of uplink resources related to measurement for the terminal apparatus 300; and a first communication processing unit 141 configured to transmit the response message for the handover message to the source base station (base station 200 ).

What is claimed is: 
     
         1 . An apparatus comprising:
 a memory storing a program; and   one or more processors configured to execute the program to:   acquire a response message for a handover message from a source base station of handover of a terminal apparatus, the response message including information of uplink resources related to measurement for the terminal apparatus; and   transmit the response message for the handover message to the source base station.   
     
     
         2 . The apparatus according to  claim 1 , wherein the information of the uplink resources related to the measurement for the terminal apparatus includes information related to resources for the terminal apparatus to transmit measurement information. 
     
     
         3 . The apparatus according to  claim 2 , wherein the information of the uplink resources related to the measurement for the terminal apparatus includes information indicating the resources for the terminal apparatus to transmit the measurement information. 
     
     
         4 . The apparatus according to  claim 2 , wherein the measurement information is channel state information (CSI). 
     
     
         5 . The apparatus according to  claim 1 , wherein the information of the uplink resources related to the measurement for the terminal apparatus includes information related to resources for the terminal apparatus to transmit an uplink reference signal. 
     
     
         6 . The apparatus according to  claim 5 , wherein the information of the uplink resources related to the measurement for the terminal apparatus includes information indicating the resources for the terminal apparatus to transmit the uplink reference signal. 
     
     
         7 . The apparatus according to  claim 5 , wherein the uplink reference signal is a sounding reference signal (SRS). 
     
     
         8 . The apparatus according to  claim 1 , wherein the information of the uplink resources related to the measurement for the terminal apparatus is information to be transmitted from the source base station to the terminal apparatus. 
     
     
         9 . The apparatus according to  claim 8 , wherein the one or more processors configured to execute the program to receive a signal transmitted from the terminal apparatus, based on the information of the uplink resources related to the measurement for the terminal apparatus. 
     
     
         10 . The apparatus according to  claim 1 , wherein the one or more processors configured to execute the program to receive, from the source base station, the handover message including beam related information related to a beam, and
 the information of the uplink resources related to the measurement for the terminal apparatus is information of uplink resources in radio resources selected based on the beam related information, the information being information of uplink resources related to the measurement for the terminal apparatus.   
     
     
         11 . The apparatus according to  claim 10 , wherein the one or more processors configured to execute the program to transmit a beam through beamforming, and
 the beam related information is information related to a beam transmitted by the apparatus through beamforming.   
     
     
         12 . The apparatus according to  claim 10 , wherein the one or more processors configured to execute the program to receive a signal transmitted from the terminal apparatus, based on the information of the uplink resources related to the measurement for the terminal apparatus, by using one or more sets of beamforming weights corresponding to the radio resources selected based on the beam related information. 
     
     
         13 . The apparatus according to  claim 10 , wherein the beam related information is information related to one or more of a plurality of beams. 
     
     
         14 . The apparatus according to  claim 13 , wherein the beam related information is information indicating one or more of the plurality of beams. 
     
     
         15 . The apparatus according to  claim 13 , wherein the information of the uplink resources related to the measurement for the terminal apparatus is information of uplink resources in radio resources corresponding to one or more beams selected based on the beam related information, the information being information of uplink resources related to the measurement for the terminal apparatus. 
     
     
         16 . The apparatus according to  claim 10 , wherein the beam related information is information indicating one or more sets of a plurality of sets of beamforming weights. 
     
     
         17 . The apparatus according to  claim 15 , wherein the information of the uplink resources related to the measurement for the terminal apparatus is information of uplink resources in radio resources corresponding to one or more sets of beamforming weights selected based on the beam related information, the information being information of uplink resources related to the measurement for the terminal apparatus. 
     
     
         18 . The apparatus according to  claim 10 , wherein the beam related information corresponds to beam related information transmitted from the terminal apparatus to the source base station. 
     
     
         19 . An apparatus comprising:
 a memory storing a program; and   one or more processors configured to execute the program to:   receive a response message for a handover message transmitted from a target base station of handover of a terminal apparatus, the response message including information of uplink resources related to measurement for the terminal apparatus; and   transmit, to the terminal apparatus, a handover command message including information corresponding to the information of the uplink resources related to the measurement for the terminal apparatus.   
     
     
         20 . A method including:
 acquiring a response message for a handover message from a source base station of handover of a terminal apparatus, the response message including information of uplink resources related to measurement for the terminal apparatus; and   transmitting the response message for the handover message to the source base station.